Chemical Vapor Deposited (CVD) Silicon Carbide
CVD silicon carbide is a grade of silicon carbide. The graph bars on the material properties cards below compare CVD silicon carbide to other non-oxide engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Compressive (Crushing) Strength
3900 MPa 570 x 103 psi
Elastic (Young's, Tensile) Modulus
430 GPa 63 x 106 psi
Flexural Strength
470 MPa 68 x 103 psi
Fracture Toughness
3.4 MPa-m1/2 3.1 x 103 psi-in1/2
Knoop Hardness
2630
Poisson's Ratio
0.21
Tensile Strength: Ultimate (UTS)
220 MPa 32 x 103 psi
Thermal Properties
Maximum Temperature: Mechanical
1580 °C 2880 °F
Maximum Thermal Shock
660 °C 1220 °F
Specific Heat Capacity
670 J/kg-K 0.16 BTU/lb-°F
Thermal Conductivity
170 W/m-K 97 BTU/h-ft-°F
Thermal Expansion
4.0 µm/m-K
Other Material Properties
Density
3.2 g/cm3 200 lb/ft3
Electrical Resistivity Order of Magnitude
2.0 10x Ω-m
Common Calculations
Stiffness to Weight: Axial
75 points
Stiffness to Weight: Bending
79 points
Strength to Weight: Axial
19 points
Strength to Weight: Bending
25 points
Thermal Diffusivity
79 mm2/s
Thermal Shock Resistance
9.2 points
Followup Questions
Further Reading
Properties of Silicon Carbide, Gary L. Harris (editor), 1995
Silicon Carbine Ceramics: Fundamental and Solid Reaction, Shigeyuki Somiya and Yoshizo Inomata (editors), 1991
Handbook of Refractory Carbides and Nitrides: Properties, Characteristics, Processing and Applications, Hugh O. Pierson, 1996
Ceramics and Composites: Processing Methods, Narottam P. Bansal and Aldo R. Boccaccini (editors), 2012
Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005
Sintering of Advanced Materials: Fundamentals and Processes, Zhigang Zak Fang (editor), 2010